How to access row data in a Repeater row field?

[Estigy]

Package

Panel builder

Package Version

v4

How can we help you?

I have a Repeater with, among other form fields, an IconEntry.
This IconEntry shall get a color which is dependent on a different field of the row data:

Repeater::make('target-list')->schema([
    ...
    IconEntry::make('db-check')
        ->icon(Heroicon::CircleStack)
        ->hint(fn($state) => $state) // The field 'db-check' holds the hint, this works.
        ->color(fn(??) => ),  // How can I access the row's field 'db-check-color' here?
    ...
])

What do I need to put in there to access other fields of the same row? It's not $item or $record, because they both yield null...